Tham Khao Luang cave and related sites: The Development as a Historical and Cultural Leaning Center 15 October 2020padet sawipanResearch Author Associate Professor Dr. Rungroj Thamrungraeng Assistant Professor Dr. Achirat Chaiyapotpanit and Associate Professor Dr. Patsaweesiri Preamkulanan งานวิจัย อ.รุ่งโรจน์ ถ้ำเขาหลวง padet sawipan
